This is the 167th most frequent Romanian word.
miercuri
"Wednesday."
In this sentence, 'miercuri' refers to a specific day of the week, functioning as an adverb indicating when the action will occur.
Miercuri voi merge la bibliotecă.
On Wednesday, I will go to the library.
Here, 'miercuri' is used as a noun referring to the named day of the week in plural form to express a recurring event.
Îmi plac zilele de miercuri pentru că am cursuri interesante.
I like Wednesdays because I have interesting classes.
In this usage, 'miercuri' is an adverb again, providing temporal information about the event.